Refrigeration



June 5, 1928. 1,672,832

c. c. sPREl-:N

` REFRIGERATI ON Filed Jan. '7. 1927 Fi-c `Cheles 2. Sprecn Attomags sulating layer 22 and serves to till the Vrey y ylatented .lune 5, 1928.

UNITED STATES.iPATENTSlioFFlcE.

CHARLES C. srnnrnnfor DETROIT, MICHIGAN, -AssIGNon TOIELECTBIC REFRIGERA- TIoN CORPORATION, or DETROIT, MICHIGAN, A CoRPCnATIoN or MICHIGAN.

. BEFRIGEBATION. Y

Application inea January 7, 1927]: serial mi# 159,622.

My invention relates to refrigeration, and particularly to domestic refrigerators, and

the principal object ofmy invention is to, yprovide means for indicating the temperature existing Within a refrigerator of that type, In the drawings .accompanying thls specification and forming a part of this application l have shown, for purposes of illustration, one form which. my invention may assume, and in these drawings:

Eigure 1 is a front elevation of*v this illustrative embodiment of my invention, While Figure 2 is a section on the line 2`-2 of Figure 1.

The embodiment of my invention herein shown comprises a refrigerator 11 having one wall, as the door 12, provided with a recess 13 extending into the Wall from the in- 'ner kface and a `second recess 14 of smaller diameter extendii'ig into the V'Wall from' the outer face and abutting the inner recess to form anaperture directly through the wall. The outer end of the smaller recess is closed by a glass plate 15 held in position by an nner 'ring 16 and anon-ter ring 17, the outer ring 1,7 being heldin position by any suitable means, such as screws 18. y

A thermometer 19 is disposed Within the recess 13 in such manner that the bulb 20 is located in the spaceJ enclosed by the refrigercess 14 and hasthe greater portion of its stem surrounded by' a layer of heat insulating material 22 and a ller plug 23 islocated behind the vthermometer stem'21 and the inmaining portion of the recess 13. A perforated protective' shield 24 is disposed over the bulb 20 of the thermometer 19 and is held in place by any suitable means, such as the screws 25.

By this construct-ion the temperature con ditions existing within the refrigerator can be ascertained bylooking through the plate 15 without the necessity oflopening the refrigerator door.

From the above disclosure it will be obvious@ tiles@ killed 'in' the art thai have provided newv and improved means for indicating thetemperature existing Withinthc refrigerator with which it is combined.

At the same time it Will'be obvious to those skilled in theart that the embodiment Aof my invention 'herein Shown may be variously changed and modified Without departing :from the spirit of my invention or sacrificing the advantages thereof, and it therefore will be understood that the disclosure herein is illustrated only, and that my invention is not limited thereto.

I claim:

having an inner recess extending into said wall from the inner face thereof 'and an outer recess of smaller diameter extending into said Wall from the outerface thereof and abutting said inner recess, a transparent plate closing the outer end of said outervrecess, a thermometer disposed in the inner recess with' its stem traversing the inner end of said outer,recess and its bulb extending beyond said inner tace of said wall, a pro- 1. In combination, a refrigerator Wall tective shield disposed around said bulb, and

a ller plug disposed in said inner recess behind said thermometer stem.y

2. In combination, a refrigerator Wall hav- "ing an inner recess extending into said Wall from'the inner'face thereof and an outer recess of smaller diaineterextending into said-wall from the outerface thereof and labutting said inner recess, a transparent plate closing the outer'end of saidouter re-` cess, a thermometerdisposed in the inner recess with its stem traversing the inner end of said outer recess and its bulb'extending beyond said inner faceof said Wall',"l1'eat in` sulating material surrounding the stem of said thermometer, and a filler plug'disposed in said inner recess behind said thermometer stem. f v

In testimony whereof I hereunto' atlix my slgnature. -v

CHARLES C. SPREEN. 

